code: def tearDown(self):
      del self.data1
      del self.est1
  
file_path: pgmpy/pgmpy/tests/test_estimators/test_MmhcEstimator.py
imports: import unittest
  import pandas
  import numpy
  from pgmpy.estimators import MmhcEstimator, K2Score
  from pgmpy.factors.discrete import TabularCPD
label_desc: Use image node_id 3 for calling the TestMmhcEstimator obj's underlying member method code with example usage: obj.tearDown() without return types